Single light moving overhead in Palmdale,Ca performs a U turn then stops

Approximately at 8:30pm on August 3rd my girlfriend and I had returned from our normal walk. We stopped at our neighbor’s house to chat with them as they were sitting outside. During the conversation I was looking up as always to spot satellites. I spotted what I thought was one and excitedly pointing it out to them. It was single white light like a typical satellite and was moving straight above our heads from the N/W to a S/E direction. My girlfriend spotted it but I had to help my neighbor spot it. It took him about 5 seconds to locate it.  A few seconds later my girlfriend and my neighbor turned away and that’s when a few seconds later I saw the light take an instant U turn. I screamed out “It did a U turn”. They both look up and acknowledge that it was going in the opposite direction. As all three of us watched the UFO going in the opposite direction and In a matter of seconds it stopped moving and stayed in one position above us. I yelled out”It stoppe! d”. They agreed with me that it had stopped.  They watched it for a short time and then turned away but I kept my eyes on it. After 10 minutes my neck started to hurt from looking up for that length of time. The light never moved and I kept on telling them that they don’t realize what we were witnessing but they didn’t seem as enthusiastic as I was about we had just witness.  We went home and it had never moved as I entered my house as I watched it until then. I also pointed out to them a plane that was flying over and explained that the planes have blinking lights and aren’t that high up in the sky.
I am 66 yrs. old and have 20/20 vision. I have seen thousands of traveling satellites and have never witness one traveling at that speed and that altitude and do a U turn instantly and then slow to a stop.
No plane or helicopter could ever do what we saw tonight. I’m glad I had two witnesses to verify this report.